More often than not, we have brought in good players but they never complimented each other. For instance, when Guti was playing well, we had width and we had our wingers running diagonally behind the fullbacks. The balance was found with Ramos over lapping Beckham who supplied defensive coverage as well as long rage passing, with Robinho on the recieving end of Guti's only lethal weapon: through balls. With Diarra in the back we were solid but did not quite give Capello time to really materialize the team. This is an example of complimenting players.
On the other hand, we played Guti, Gago, Diarra, Sniejder, Robben, with Raul, Ruud, and Higuain. All players who either do not posses the through ball passing skills of Guti (or Zizou before) or they all perform best with the ball at their feet. That is why we looked flat and were found out in Europe. We also played Heinze on the left as opposed to Torres who offered much needed width from the left flank especially with Robinho's departure. Let us not make this mistake again and assemble a team of quality players but do not fit the bill.
Kaka likes to roam and switch positions. Zidane was stationary, he played football in the middle of the pitch because his ball control is second to none, whereas Kaka likes to run with it. Robben might succeed with Kaka, but to a certain extent, and in the middle there will be a lot of wasted energy. Kaka thrives on energy, the faster the pace, the better he plays. Plus he likes to connect with teammates, therefore players who can combine smart link up and offer open space with good ball control are the best option for Kaka. The likes of Valencia (played great at the world cup, that is when I first noticed him) and Ribery. As long as there is movement upfront, Kaka will be able to work his magic. We cannot play Barcelona's patient football, we never did, we never will. Players like C Ronaldo catches teams off guard, and players like Robben do not run behind defenders but rather beat them.
Also, Kaka likes to drop in the box, therefore playing Torres and Ramos is essential. If not the full backs because Pellegrini does not like that but would rather his wingers to do so, then Marcelo from one end can deliver low crosses into the box, with Valencia/Ribery or Ramos from the other side. As long as balls are crossed in, Kaka will get a foot onto them.
A lot will depend on communication, and trust. During our successful period, Guti was asked about a goal we conceded from a midfield error taht resulted in a successful counter attack and he said, among the players, there is a great deal of trust. Sometimes a little too much, but at one point in time that made us so successful in that top players did not mind stepping back for their teammates because they were certain of their quality. Forward to 2009, and Robben does not trust his teammates. You only see Raul picking the ball from midfield and running desperately towards the goal aimlessly, with Hunterlaar being left out and completely ignored, and Guti throwing hissy fits for not being able to pass the ball properly (quite frankly, no one was of proper quality to be on the recieving end). Higuain usually does things on his own out of the blue. Van der Vaart never said a word. Gago was left exposed all the time and was seen flopping week in week out. Barcelona believe in a set system, we believe in quality. Zidane never scored a lot, but that is because had Figo not been his partner in midfield he would have attempted more shots.
We aren't too far away from being as strong as we should be.
5-6 players was spot on from Perez, especially if you consider a long term project. If the rumors are true, with Kaka and Xabi in midfield a lot changes but Raul needs to fucking lay low.
Has anyone seen how strong Granero is on top of the ball? Ten times better than VDV, more composed than Sniejder, and poses a mean shot. I swear to god everytime I see one of our footballers perform so eloquently it brings a tear to my eye, especially when I see footage of De la Red.
Players who would compliment Kaka:
Valencia
Ribery
Xabi
Mata
I don't think Silva would compliment Kaka as much as players like Mata who get into the box from the wing.
Sorry if I am incoherent but I am so tired and in dire need of sleep.